What is the Purpose of the Watery Fluid Secreted by the Serosa

Question

What is the purpose of the watery fluid secreted by the serosa of the human digestive tract?
A) It kills bacteria.
B) It initiates peristalsis.
C) It reduces friction between nearby organs.
D) It emulsifies fats.

Accepted Answer

The watery fluid secreted by the serosa (a serous membrane) of the human digestive tract serves to lubricate and thus reduce friction between the digestive organs and surrounding tissues as they move.